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功能如下：
1、缩放、旋转、翻转和调整图像大小
2、幻灯片
3、缩略图栏（左、上或下）；不同的缩略图大小
4、Exif数据栏
5、内联图像重命名
6、自定义快捷方式
7、图像注释（箭头、矩形、圆形、数字）
8、最近的文件
9、上传图片（Imgur）
10、截屏

一、演示效果

二、关键程序

using namespace LxImage;static bool hasXFixes() {int event_base, error_base;return XFixesQueryExtension(QX11Info::display(), &event_base, &error_base);
}ScreenshotDialog::ScreenshotDialog(QWidget* parent, Qt::WindowFlags f): QDialog(parent, f), hasXfixes_(hasXFixes()) {ui.setupUi(this);Application* app = static_cast<Application*>(qApp);app->addWindow();if(!hasXfixes_) {ui.includeCursor->hide();}
}ScreenshotDialog::~ScreenshotDialog() {Application* app = static_cast<Application*>(qApp);app->removeWindow();
}void ScreenshotDialog::done(int r) {if(r == QDialog::Accepted) {hide();QDialog::done(r);XSync(QX11Info::display(), 0); // is this useful?int delay = ui.delay->value();if(delay == 0) {// NOTE:// Well, we need to give X and the window manager some time to// really hide our own dialog from the screen.// Nobody knows how long it will take, and there is no reliable// way to ensure that. Let's wait for 400 ms here for it.delay = 400;}else {delay *= 1000;}// the dialog object will be deleted in doScreenshot().QTimer::singleShot(delay, this, SLOT(doScreenshot()));}else {deleteLater();}
}QRect ScreenshotDialog::windowFrame(WId wid) {QRect result;XWindowAttributes wa;if(XGetWindowAttributes(QX11Info::display(), wid, &wa)) {Window child;int x, y;// translate to root coordinateXTranslateCoordinates(QX11Info::display(), wid, wa.root, 0, 0, &x, &y, &child);//qDebug("%d, %d, %d, %d", x, y, wa.width, wa.height);result.setRect(x, y, wa.width, wa.height);// get the frame widths added by the window managerAtom atom = XInternAtom(QX11Info::display(), "_NET_FRAME_EXTENTS", false);unsigned long type, resultLen, rest;int format;unsigned char* data = nullptr;if(XGetWindowProperty(QX11Info::display(), wid, atom, 0, G_MAXLONG, false,XA_CARDINAL, &type, &format, &resultLen, &rest, &data) == Success) {}if(data) {  // left, right, top, bottomlong* offsets = reinterpret_cast<long*>(data);result.setLeft(result.left() - offsets[0]);result.setRight(result.right() + offsets[1]);result.setTop(result.top() - offsets[2]);result.setBottom(result.bottom() + offsets[3]);XFree(data);}}return result;
}WId ScreenshotDialog::activeWindowId() {WId root = WId(QX11Info::appRootWindow());Atom atom = XInternAtom(QX11Info::display(), "_NET_ACTIVE_WINDOW", false);unsigned long type, resultLen, rest;int format;WId result = 0;unsigned char* data = nullptr;if(XGetWindowProperty(QX11Info::display(), root, atom, 0, 1, false,XA_WINDOW, &type, &format, &resultLen, &rest, &data) == Success) {result = *reinterpret_cast<long*>(data);XFree(data);}return result;
}QImage ScreenshotDialog::takeScreenshot(const WId& wid, const QRect& rect, bool takeCursor) {QImage image;QScreen *screen = QGuiApplication::primaryScreen();if(screen) {QPixmap pixmap = screen->grabWindow(wid, rect.x(), rect.y(), rect.width(), rect.height());image = pixmap.toImage();//call to hasXFixes() maybe executed here from cmd line with no gui mode (some day though, currently ignore cursor)if(takeCursor &&  hasXFixes()) {// capture the cursor if neededXFixesCursorImage* cursor = XFixesGetCursorImage(QX11Info::display());if(cursor) {if(cursor->pixels) {  // pixles should be an ARGB arrayQImage cursorImage;if(sizeof(long) == 4) {// FIXME: will we encounter byte-order problems here?cursorImage = QImage((uchar*)cursor->pixels, cursor->width, cursor->height, QImage::Format_ARGB32);}else { // XFixes returns long integers which is not 32 bit on 64 bit systems.long len = cursor->width * cursor->height;quint32* buf = new quint32[len];for(long i = 0; i < len; ++i) {buf[i] = (quint32)cursor->pixels[i];}cursorImage = QImage((uchar*)buf, cursor->width, cursor->height, QImage::Format_ARGB32, [](void* b) {delete[](quint32*)b;}, buf);}// paint the cursor on the current imageQPainter painter(&image);painter.drawImage(cursor->x - cursor->xhot, cursor->y - cursor->yhot, cursorImage);}XFree(cursor);}}}return image;
}void ScreenshotDialog::doScreenshot() {WId wid = 0;QRect rect{0, 0, -1, -1};wid = QApplication::desktop()->winId(); // get desktop windowif(ui.currentWindow->isChecked()) {WId activeWid = activeWindowId();if(activeWid) {if(ui.includeFrame->isChecked()) {rect = windowFrame(activeWid);}else {wid = activeWid;}}}//using stored hasXfixes_ so avoid extra call to function laterQImage image{takeScreenshot(wid, rect, hasXfixes_ && ui.includeCursor->isChecked())};if(ui.screenArea->isChecked() && !image.isNull()) {ScreenshotSelectArea selectArea(image);if(QDialog::Accepted == selectArea.exec()) {image = image.copy(selectArea.selectedArea());}}Application* app = static_cast<Application*>(qApp);MainWindow* window = app->createWindow();window->resize(app->settings().windowWidth(), app->settings().windowHeight());if(!image.isNull()) {window->pasteImage(image);}window->show();deleteLater(); // destroy ourself
}static QString buildNumericFnPart() {//we may have many copies running with no gui, for example user presses hot keys fast//so they must have different file names to save, lets do it time + pidconst auto now = QDateTime::currentDateTime().toMSecsSinceEpoch();const auto pid = getpid();return QStringLiteral("%1_%2").arg(now).arg(pid);
}static QString getWindowName(WId wid) {QString result;if(wid) {static const char* atoms[] = {"WM_NAME","_NET_WM_NAME","STRING","UTF8_STRING",};const auto display = QX11Info::display();Atom a = None, type;for(const auto& c : atoms) {if(None != (a = XInternAtom(display, c, true))) {int form;unsigned long remain, len;unsigned char *list;errno = 0;if(XGetWindowProperty(display, wid, a, 0, 1024, False, XA_STRING,&type, &form, &len, &remain, &list) == Success) {if(list && *list) {std::string dump((const char*)list);std::stringstream ss;for(const auto& sym : dump) {if(std::isalnum(sym)) {ss.put(sym);}}result = QString::fromStdString(ss.str());break;}}}}}return (result.isEmpty()) ? QStringLiteral("UNKNOWN") : result;
}void ScreenshotDialog::cmdTopShotToDir(QString path) {WId activeWid = activeWindowId();const QRect rect = (activeWid) ? windowFrame(activeWid) : QRect{0, 0, -1, -1};QImage img{takeScreenshot(QApplication::desktop()->winId(), rect, false)};QDir d;d.mkpath(path);QFileInfo fi(path);if(!fi.exists() || !fi.isDir() || !fi.isWritable()) {path = QDir::homePath();}const QString filename = QStringLiteral("%1/%2_%3").arg(path).arg(getWindowName(activeWid)).arg(buildNumericFnPart());const auto static png = QStringLiteral(".png");QString finalName = filename % png;//most unlikelly this will happen ... but user might change system clock or so and we dont want to overwrite filefor(int counter = 0; QFile::exists(finalName) && counter < 5000; ++counter) {finalName = QStringLiteral("%1_%2%3").arg(filename).arg(counter).arg(png);}//std::cout << finalName.toStdString() << std::endl;img.save(finalName);
}

三、下载链接

https://download.csdn.net/download/u013083044/88628914